random.c: resolves a warning
random.c: resolves a warning

richarddzh/vlfeat,WangDequan/vlfeat,hongzhili/vlfeat,richarddzh/vlfeat,cvfish/vlfeat,WangDequan/vlfeat,CansenJIANG/vlfeat,richarddzh/vlfeat,cvfish/vlfeat,erexhepa/vlfeat,mylxiaoyi/vlfeat,qubick/vlfeat,cvfish/vlfeat,erexhepa/vlfeat,j-bo/vlfeat,mylxiaoyi/vlfeat,cvfish/vlfeat,rxl194/vlfeat,rxl194/vlfeat,mylxiaoyi/vlfeat,vlfeat/vlfeat,CansenJIANG/vlfeat,mylxiaoyi/vlfeat,erexhepa/vlfeat,qubick/vlfeat,j-bo/vlfeat,hongzhili/vlfeat,hongzhili/vlfeat,WangDequan/vlfeat,qubick/vlfeat,rxl194/vlfeat,mylxiaoyi/vlfeat,vlfeat/vlfeat,vlfeat/vlfeat,WangDequan/vlfeat,CansenJIANG/vlfeat,WangDequan/vlfeat,qubick/vlfeat,hongzhili/vlfeat,j-bo/vlfeat,WangDequan/vlfeat,rxl194/vlfeat,richarddzh/vlfeat,vlfeat/vlfeat,vlfeat/vlfeat,CansenJIANG/vlfeat,hongzhili/vlfeat,qubick/vlfeat,CansenJIANG/vlfeat,hongzhili/vlfeat,rxl194/vlfeat,j-bo/vlfeat,vlfeat/vlfeat,erexhepa/vlfeat,cvfish/vlfeat,richarddzh/vlfeat,erexhepa/vlfeat,cvfish/vlfeat,j-bo/vlfeat,erexhepa/vlfeat,rxl194/vlfeat,richarddzh/vlfeat,mylxiaoyi/vlfeat,qubick/vlfeat,CansenJIANG/vlfeat